Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

SUBSEQUENT EVENTS (Details) - shares		1 Months Ended	2 Months Ended	3 Months Ended	6 Months Ended	132 Months Ended
SUBSEQUENT EVENTS (Details) - shares	Aug. 31, 2007	Sep. 30, 2007	Aug. 31, 2020	Dec. 31, 2007	Jun. 30, 2019	Dec. 31, 2018
Subsequent events
Number of depository receipts repurchased	1,428,437	1,428,437		1,428,437	1,428,437	1,428,437
Subsequent event
Subsequent events
Number of depository receipts repurchased			0